Light emitting device for high current operation
2011
PURPOSE: A light emitting device for high current driving is provided to improve luminous efficiency by reflecting light through a selection reflector and outputting the reflected light to the outside. CONSTITUTION: UV LED chips(30a,30b,30c) are attached to a substrate(21) and emit ultraviolet rays within a range of 280 to 400 nm. A wavelength converting layer(46) converts the ultraviolet rays from the UV LED chip into visible rays. The wavelength converting layer includes a first wavelength converting layer(43) with a red fluorescent substance, a second wavelength converting layer(45) with a green fluorescent substance, and a third wavelength converting layer(47) with a blue fluorescent substance. A selection reflector is located between the UV LED chip and the wavelength converting layer. A UV filter(39) blocks UV emitted from the wavelength converting layer to the outside.
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